I so adore your enquiring heart and soul, your passionate love of your beautiful son and am so beyond sorry you will not be growing forward together with each other.

He said: “I am in total shock as I’ve lost the most precious person I had ever connected with.

“My brain keeps going into denial. I am distraught. She was also pregnant so I lost my child too. I need as much love and support as I can get from everyone.”

Sophie, understood to be six months pregnant at the time of the crash, made national headlines last year after saying women should breastfeed until their children are eight.

Her YouTube channel, which shows her breastfeeding her young son, has amassed millions of views.

Her last clip was uploaded just hours before the accident, which happened on a busy dual carriageway, which has three lanes in each direction, in the Thalang district of Phuket,which is Thailand’s largest island.

Paramedics were photographed helping Sophie as she lay on the ground outside a 7-Eleven store, while police officers were pictured moving the couple’s white bike to the side of the road.

Lt Col Sanit Nookong, the investigating officer, said: “She was riding on a motorbike with her partner when they changed lanes to avoid a vehicle parked and blocking their path in the motorbike lane of the road. As they did this, the truck hit them from behind. [Sophie] was then run over by the truck and sustained fatal head injuries.”

One eyewitness told The Gazette: “I just saw the end of what happened.

“A woman had been knocked off by a lorry and her boyfriend was really upset.

“They just took her away. I asked around and they said she was from Blackpool.”

Friends last night paid tribute to Sophie on social media. Susan Ure Reid posted on Facebook that she was ‘hugely shocked’ by the news.

She wrote: “I so adore your enquiring heart and soul, your passionate love of your beautiful son and am so beyond sorry you will not be growing forward together with each other.”

Louise Koch posted: “you will be greatly missed and I send you all my love.”

Last year, the Southeast Asian country’s government promised to try and improve safety for visitors.

It was revealed 83 foreign travellers died in Thailand in 2015, a 54 per cent increase from the year before. Another 166 were injured.

Road accidents were blamed for the majority of deaths, with 34 people killed in crashes, while swimming and boating accidents claimed nine lives.

The Foreign Office had not responded to a request for comment at the time of going to print.